What Size Mini Split Should You Get for Your Garage?

If you’re considering a mini split for your garage, you might be wondering what size you need. Here’s a quick guide to help you choose the right unit for your space.

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What is a mini split?

A mini split is a type of air conditioner that doesn’t require ductwork. They are very popular in places likegarages, bedrooms, and attics where it’s difficult or impossible to install ductwork. Mini splits are also more efficient than traditional AC units, so they can save you money on your energy bills.

How to determine the size you need

The size of the mini split you need for your garage will depend on a few factors. The first factor is the size of your garage. The second factor is the climate. If you live in a climate that is mostly hot, you will need a larger mini split than if you live in a climate that is mostly cold. The third factor is how many people will be using the mini split.

Square footage

This is the most basic factor to consider when choosing a mini split system for your garage. Each model will have a maximum BTU capacity (British Thermal Unit, a unit of energy), which corresponds to a certain square footage. That means that you need to know the square footage of the space you want to heat or cool before you can choose the right mini split.

If you’re not sure of the square footage, don’t worry – most manufacturers have general guidelines based on the type of space. For example, a 500-sq-ft garage would need a 12,000 BTU unit, while a 400-sq-ft office would require 9,000 BTUs. Once you know the square footage, you can narrow down your choices by BTU capacity.

Number of rooms

When choosing what size mini split to get for your garage, you’ll need to determine how many rooms you’ll be cooling. To do this, simply measure the square footage of the room or rooms. Once you know how many square feet you need to cool, refer to the table below to find out how many BTUs (British Thermal Units) per hour you’ll need.

Keep in mind that these are just estimates. The actual number of BTUs required may be higher or lower depending on a variety of factors such as climate, local weather conditions, ceiling height, number of windows and doors, sun exposure, etc.

*1 BTU = 1,055 joules

Square footage BTUs needed
150 – 250 5,000 – 6,000
250 – 400 6,000 – 8,000
400 – 600 8,000 – 12,000
600 – 1,000 12,000 – 18,000


When determining what size mini split to get for your garage, the first thing you need to consider is your climate. If you live in an area with very extreme temperatures, you’re going to need a mini split that can handle those conditions. On the other hand, if you live in a more moderate climate, you won’t need as much power from your mini split.

Types of mini splits

There are many types of mini splits, each with their own set of benefits. The most popular mini splits are the ductless mini split and the central air conditioner. The ductless mini split is a great option for those who want to heat or cool a specific area, such as a garage. It is also a good choice for those who want to save on energy costs. The central air conditioner is a good option for those who want to cool an entire home or office.


A single-zone mini split system is perfect for heating or cooling a smaller space, like a garage, home office, or sunroom. With just one indoor unit connected to an outdoor unit, these systems are easy to install and maintain.


Multi-zone mini splits offer the ultimate in flexibility when it comes to heating and cooling your home. These systems allow you to control the temperature in multiple rooms or areas of your home with a single outdoor unit. That means you can keep your living room cool while your kids enjoy the warmth of their bedrooms, all from a single system.

Multi-zone mini splits are available in a variety of configurations, from two-zone systems that can control two separate areas to eight-zone systems that can heat and cool up to eight different areas. The number of indoor units you’ll need will depend on the size of the area you’re trying to heat or cool, so it’s important to consult with a professional before making your purchase.


As you think about outfitting your garage with heating and cooling, you might be wondering what size mini split you need. It’s an important question, since an HVAC contractor will base their recommendations, at least in part, on the square footage of your garage. But there are other factors to consider, as well. In this article, we’ll explore everything you need to know to make an informed decision about what size mini split to get for your garage.


An important consideration when deciding what size mini split to get for your garage is cost. A mini split system typically costs between $1,500 and $3,000, and the price will vary depending on the size of the unit, the features it offers, and the brand. mini splits are an investment, but they can save you money on your energy bills in the long run.

In addition to the cost of the unit itself, you will also need to factor in the cost of installation. Installation typically costs between $500 and $1,500, depending on the complexity of the job. If you are hiring a professional to install your mini split, be sure to get multiple quotes to ensure you are getting a fair price.


When choosing a mini split system for your garage, efficiency is key. You want a system that will be effective in heating or cooling your space without using too much energy. To find an efficient mini split, look for one with a high Seasonal Energy Efficiency Ratio (SEER) and Energy Efficiency Ratio (EER). The higher these numbers are, the more efficient the system will be.

In addition to efficiency, you also want to consider the size of the mini split unit. The size of the unit will determine how much space it can effectively heat or cool. To choose the right size mini split for your garage, start by measuring the square footage of the space. Then, consult a sizing chart to find a unit that is appropriate for your needs.

Finally, you will also want to consider the features of the mini split system. Some units come with features that can improve comfort or convenience, such as remote control operation or timers. Choose a unit with features that will meet your needs and make using your mini split system easy and enjoyable.


As a general rule of thumb, you should get a mini split that is at least 12,000 BTUs for a two-car garage. This will ensure that the system can adequately cool or heat the space. If you live in an area with extreme temperatures, you may want to consider a higher capacity unit.